Kenji Arai / INA219

INA219 (Texas Instruments) High-Side Measurement,Bi-Directional CURRENT/POWER MONITOR with I2C Interface

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INA219 Class Reference
Public Member Functions

INA219 Class Reference

INA219 High-Side Measurement,Bi-Directional CURRENT/POWER MONITOR with I2C Interface. More...

#include <INA219.h>

Public Member Functions

 INA219 (PinName p_sda, PinName p_scl, const INA219_TypeDef *ina219_parameter)
 Configure data pin.
 INA219 (I2C &p_i2c, const INA219_TypeDef *ina219_parameter)
 Configure data pin (with other devices on I2C line)
float read_current (void)
 Read Current data.
float read_power (void)
 Read Power data.
float read_bus_voltage (void)
 Read Bus voltage.
float read_shunt_voltage (void)
 Read Shunt voltage data.
uint16_t read_config (void)
 Read configration reg.
uint16_t set_config (uint16_t cfg)
 Set configration reg.
uint16_t read_calb (void)
 Read calibration reg.
uint16_t set_calb (uint16_t clb)
 Set calibration reg.
void frequency (int hz)
 Set I2C clock frequency.
uint8_t read_reg (uint8_t addr)
 Read register (general purpose)
uint8_t write_reg (uint8_t addr, uint8_t data)
 Write register (general purpose)

Detailed Description

INA219 High-Side Measurement,Bi-Directional CURRENT/POWER MONITOR with I2C Interface. 

 //--------- Default setting -----------------
 #include "mbed.h"
 #include "INA219.h"

 // I2C Communication
 INA219 current(dp5, dp27, INA219_ADDR_GG);
 // If you connected I2C line not only this device but also other devices,
 //     you need to declare following method.
 I2C    i2c(dp5, dp27);
 INA219 current(I2C& p_i2c, INA219_ADDR_GG);

 int main() {
     while(1){
         printf("I=%+6.3f [mA]\r\n", current.read_current());
         wait(1.0):
     }
 }
 //--------- Detail setting -----------------
 #include "mbed.h"
 #include "INA219.h"

 const INA219_TypeDef ina219_my_paramtr = {
    // I2C Address
    INA219_ADDR_GG,
    // CONFIG Reg.
    INA219_PAR_R_100MOHM,     // 100 milli-ohm
    INA219_CFG_B16V,          // 16V max
    INA219_PAR_G_40MV,        // Gain x1
    INA219_PAR_M_SHNTBUS_CONT,// Measure continuously
    // CALIB
    16384                     // Calibration data is nothing
 };

 I2C    i2c(dp5,dp27);
 INA219 current(I2C& p_i2c, &ina219_my_paramtr);

 int main() {
     while(1){
         printf("I=%+6.3f [mA]\r\n", current.read_current());
         wait(1.0):
     }
 }

Definition at line 182 of file INA219.h.

Constructor & Destructor Documentation

INA219 ( PinName  p_sda,
PinName  p_scl,
const INA219_TypeDef *  ina219_parameter 
)

Configure data pin.

Parameters:
dataSDA and SCL pins
parameteraddress chip (INA219_TypeDef)
orjust set address or just port

Definition at line 16 of file INA219.cpp.

INA219 ( I2C &  p_i2c,
const INA219_TypeDef *  ina219_parameter 
)

Configure data pin (with other devices on I2C line)

Parameters:
I2Cprevious definition
parameteraddress chip (INA219_TypeDef)
orjust set address or just port

Definition at line 44 of file INA219.cpp.

Member Function Documentation

void frequency ( int  hz )

Set I2C clock frequency.

Parameters:
freq.
Returns:
none

Definition at line 201 of file INA219.cpp.

float read_bus_voltage ( void   )

Read Bus voltage.

Parameters:
none
Returns:
voltage [v]

Definition at line 92 of file INA219.cpp.

uint16_t read_calb ( void   )

Read calibration reg.

Parameters:
none
Returns:
calibration register value

Definition at line 143 of file INA219.cpp.

uint16_t read_config ( void   )

Read configration reg.

Parameters:
none
Returns:
configrartion register value

Definition at line 122 of file INA219.cpp.

float read_current ( void   )

Read Current data.

Parameters:
none
Returns:
current [mA]

Definition at line 72 of file INA219.cpp.

float read_power ( void   )

Read Power data.

Parameters:
none
Returns:
power [w]

Definition at line 82 of file INA219.cpp.

uint8_t read_reg ( uint8_t  addr )

Read register (general purpose)

Parameters:
register'saddress
Returns:
register data

Definition at line 164 of file INA219.cpp.

float read_shunt_voltage ( void   )

Read Shunt voltage data.

Parameters:
none
Returns:
voltage [v]

Definition at line 102 of file INA219.cpp.

uint16_t set_calb ( uint16_t  clb )

Set calibration reg.

Parameters:
@returncalibration register value

Definition at line 153 of file INA219.cpp.

uint16_t set_config ( uint16_t  cfg )

Set configration reg.

Parameters:
@returnconfigrartion register value

Definition at line 132 of file INA219.cpp.

uint8_t write_reg ( uint8_t  addr,
uint8_t  data 
)

Write register (general purpose)

Parameters:
register'saddress
data
Returns:
register data

Definition at line 172 of file INA219.cpp.

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